JANS1N4491C

Single Zener Diodes Overview

The JANS1N4491C is a single Zener diode manufactured by Microchip Technology, designed for high-reliability applications. It features a nominal Zener voltage of 120 V with a tight tolerance of ±2%. The device is rated for a maximum power dissipation of 1.5 W and utilizes an E-Axial (DO-204AL/DO-41) through-hole package. It operates within a junction temperature range of -65°C to 175°C. The component is hermetically sealed in a void-less glass package with triple-layer passivation, ensuring robust construction suitable for harsh environments.

Single Zener Diodes Feature Summary

• Hermetically sealed void-less glass package with triple-layer passivation for extreme robustness
• Military-grade qualification compliant with MIL-PRF-19500/356 standards
• High thermal stability supporting operation up to 175°C junction temperature

Single Zener Diodes Applications

• Radiation-hardened aerospace systems
• Military electronic circuits requiring high reliability
• Harsh environment voltage regulation

Single Zener Diodes Procurement Notes

Verify the specific revision level and lot traceability upon order confirmation. Ensure that the procurement channel provides valid certification documents confirming compliance with MIL-PRF-19500/356. Check for any export control classifications or special handling requirements associated with military-grade components before finalizing the purchase agreement.

Single Zener Diodes Selection Notes

Select this component when radiation hardness and long-term reliability are critical. The 120 V rating and 1.5 W power dissipation define its operational limits. Compare against standard commercial variants if environmental constraints are less severe, as this part includes specialized packaging and testing protocols not found in general-purpose equivalents.

Single Zener Diodes Part Context

This device belongs to the JAN series of Zener diodes produced by Microchip Technology. It is part of a family of radiation-hardened semiconductors intended for defense and space applications. The JANS suffix indicates enhanced screening and quality assurance procedures compared to standard commercial parts, ensuring performance consistency under extreme conditions.

Single Zener Diodes Replacement Considerations

Public confirmed substitute part numbers include JAN1N4491C and JAN1N4991C. Verify pinout compatibility and exact voltage tolerances before substitution. Ensure the replacement maintains the required hermetic seal and radiation hardness specifications for the target application.